Seal ring for stern tube



FIG. 1 is a perspective view of a seal ring for a stern tube.

FIG. 2 is a right-side view of the seal ring, the left-side view being a mirror image of the right-side view, and the top and bottom view being identical thereto.

FIG. 3 is an enlarged cross-sectional view taken along line 3—3 of FIG. 5.

FIG. 4 is a front view of the seal ring; and,

FIG. 5 is a rear view of the seal ring. 

We claim the ornamental design for a seal ring for a stern tube, as shown and described. 